code: def test_predict_gpu(self):
      self.link.to_gpu()
      assert_is_semantic_segmentation_link(self.link, self.n_class)
  
file_path: chainercv/tests/links_tests/model_tests/segnet_tests/test_segnet_basic.py
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links import SegNetBasic
  from chainercv.utils import assert_is_semantic_segmentation_link
label_desc: Use image node_id 6 for calling the TestSegNetBasic obj's underlying member method code with example usage: obj.test_predict_gpu() without return types